Sound-reproducing machine.



PATENTED SEPT. 25, 1906.

0. A. SMITH. SOUND RBPRODUCING MACHINE.

APPLICATION FILED JUNE 5, 1905.

2 SHEETS-SHEET 1.

No. 831,900. PATENTED SEPT. 25. 1906. O. A. SMITH. SOUND REPRODUCING MACHINE.

APPLICATION FILED JUNE 5, 1905.

2 SHEETSSHEET 2 UNITED STATES PATENT OFFICE.

CURTIS A. SMITH; 0F ELGIN, ILLINOIS.

' hSOUND-REP RODUCING MACHINE.

li'o. 831,900.

Specification of Letters Patent.

Patented Sept. 25, 1906.

Application filed June 5,1905. Serial No. 263,636.

'ments in sound-reproducing machines, and

has special'reference to the production of means for modifying the quality of the sound issuing from the sound-ducts to the audience.

Certain sounds are modified to a greater extent than others by modifying the volume of sound issuing from the instrument, and by inserting a mute or stop inthe sound-duct high shrill sounds and scratching noises can be eliminated to a great extent. To attain the advantages of this phenomenon in a simple and practical manner my invention consists of a new and novel form and arrange-.

ment of sound-duct, as will presently appear.

Figure 1 is a rear elevation of a sound-reproducing machine with my invention as applied thereto. Fig. 2 is a vertical sectional view of my invention. Fig. 3 is a detail view of a part of my invention, showing the posi-' tion of parts when my invention is thrown out of operation. Fig. 4 is a detail sectional view of the extension-piece with the mute or stop disk in position and the exteriorly-located button for operating same.

In the drawings the numeral 1 is a soundroducing machine with the castin 2, to ch is usually attached the amplifyinghorn 3.

The numeral 4 indicates an extension sectionor piece, the lower end or bottom 5 of which'is made similar to the end of the amplifying-horn, sothat it will assemble readily wit the casting 2. The upper end 6 of the extension-piece 4 is made similar to the top of the casting so that the amplifying-horn can be attached thereto. In the opposite sides of the extension-piece 4 are provided the apertures or openings 7 and 8, one above the plane of the other, as shown. To the outer surface of the extension-piece 4 and surrounding the apertures 7 and 8 are attached by brazing, soldering, or other appropriate method the small lengths of metalhc tubing 9 and 10. Over the outer ends of the short tubes 9 and 10 I ass the opposite ends of the tubing 11. l he tubin 11 may be of any appropriate materialsuc as rubber, metal, fabric, or a combination of these materials.

Between the planes of the apertures T and 8, as specifically referred to in the dorms, I provide the mute or stop disk 12, which. is carried upon the axle 13. The said axle 13 at right angles to the direction of the tubes 5) and 10 and has its bearings in the walls of the extension-piece 4. One end of the axle 13 is provided with an exteriorly-located button 15, by means of which the disk 1.2 may be adjusted transversely to .or longitudinally with the axis of the extension-piece 4.

When it is desired to use my device, the disk 12 is adjusted, as shown in Fi 2, the

"sound is then com elled to enter t 1e aperature 7, traverse t-e tubing 11, reenter the extension-piece 4 through the aperture 8, and from thence through the amplifying-horn to the audience.

When it is desired to operate the instrument without my sound-1n odifier, there is no need to detach it from the instrument. It is only necessary to adjust the disk 12, as shown in Fig.- 3, when the sound passes directly through the extension-piece 4 to the amplifyin -horn and thence to the audience. It will e noticed that-in Figs. 2 and 3 I show packing-gaskets 14 both at the top and bottom of the extension-piece 4, I find it is necessary to pack these joints to prevent a murmur of the reproduced sound escaping What I claim as new, and desire to secure by Letters Patent, is-

1. In a sound-reproducing machine, means for modifying reproduced sound consisting of twosections of sound conduit or conveyer, one of which sections is adapted to modify the sound, and means carried by the other oi said sections for directing the reproduced sound throu h the modifying-section.

' 2. In com inationwith a sound-reproducing machine, means for. modifying reproduced sound consisting of two sections of sound conduit or conveyer, one of which sec tions is adapted to modify the sound and ad'- justable means carried in the other of said sections for directing the reproduced sound through the modifying section.

3. In combination with a sound-reproduc- -with means for locating v producing means and ing machine, a cylindrical sound-conveyer same between the reelivery ortion of said machine, said cylindrical soun -conveyer being provided with a length of sound-conveying tubing adapted to modify the sound and adjustable "means for directing the reproduced sound throu h said sound-modifying tubing when desire 4. =In-combination Witha sound-reproducmachine, a sound-conveying cylinderp'ro- Ni ed with --two lateral apertures, -one located above theother, a length of sound-conveying tubing connecting said apertures and adjustable means located in which can be adjusted to direct the semi through said sound-conveying'tubing, wheres by the length of the sound-conduit can be modified, thereby sound.

In testimony'whereof I aflix my signature 'in presence of two witnesses.

CURTIS vA. SMITH.

Witnesses:

BENJ. T. RooDHoUsE, BYRON W. WIGHT.

said cylinder I 5 modifying the reproduced I 

